Numbers 1:4 Midrash

וְאִתְּכֶ֣ם יִהְי֔וּ אִ֥ישׁ אִ֖ישׁ לַמַּטֶּ֑ה אִ֛ישׁ רֹ֥אשׁ לְבֵית־אֲבֹתָ֖יו הֽוּא׃

And with you there shall be a man of every tribe, every one head of his fathers’house.

Read midrashic interpretation of Numbers 1:4: and classical rabbinic exegesis.